Two eminent Harvard researchers describe the medical benefits of marihuana, explain why its use has been forbidden, and argue for its full legalization to make it available to patients who need it.

Examples of the ways that marihuana alleviates symptoms of cancer chemotherapy, multiple sclerosis, osteoarthritis, glaucoma, AIDS, and depression, as well as symptoms of such less common disorders as Crohn`s disease, diabetic gastroparesis, and post-traumatic stress disorder.